Bill , please .   Please wait a moment ... here is the bill . Please check it .   Excuse me , what's this item for ?   For three bottles of Tsingtao beer .   But we've can canceled one bottle .   Oh , I'm sorry . Let me go back to the cashier's to have it changed . ( a few minutes later , the waiter returns with the new bill . )   I'm sorry for the miscalculation . Here's the new bill . Would you mind checking it again ?   That's all right .   If you're staying at our hotel , you may sign the bill . 